Short wavelength ultraviolet photolysis of aqueous carbon tetrachloride
- Univ. of North Carolina, Chapel Hill (United States)
A dielectric barrier discharge xenon-xenon excimer lamp, which emits with a maximum peak at 172 nm, was used to photolyze carbon tetrachloride (CCl[sub 4]) in air and in water. In air the primary removal mechanism for CCl[sub 4] was found to be oxidation by atomic oxygen O([sup 1]D). The O([sup 1]D) radicals were formed by photolysis of O[sub 2]. Direct photolysis of CCl[sub 4] and reaction with OH[sup [sm bullet]], from the photodissociation of H[sub 2]O, were found to play minor roles. In aqueous phase photolysis, direct photolysis of CCl[sub 4] was minimal and reactions with OH[sup [sm bullet]] or H[sup [sm bullet]] from the photolysis of H[sub 2]O were found to dominate the removal rate. The energy costs of Vacuum Ultraviolet (VUV) photolysis as a treatment method are estimated for CCl[sub 4] and chloroform (CHCl[sub 3]). 20 refs., 6 figs., 2 tabs.
- OSTI ID:
- 6043565
- Journal Information:
- Hazardous Waste and Hazardous Materials; (United States), Journal Name: Hazardous Waste and Hazardous Materials; (United States) Vol. 10:2; ISSN 0882-5696; ISSN HWHME2
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
AIR
CARBON TETRACHLORIDE
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORINATED ALIPHATIC HYDROCARBONS
CHLOROFORM
COST
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ENERGY CONSUMPTION
FAR ULTRAVIOLET RADIATION
FLUIDS
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
KINETICS
MANAGEMENT
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDATION
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PROCESSING
RADIATIONS
RADICALS
REACTION KINETICS
ULTRAVIOLET RADIATION
WASTE MANAGEMENT
WASTE PROCESSING